The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2026
Filed:
Dec. 08, 2023
China Railway No. 8 Engineering Group Co., Ltd., Chengdu, CN;
Jian Hu, Chengdu, CN;
Fei Zhang, Chengdu, CN;
Zilong Zhang, Chengdu, CN;
Zhengwei Fu, Chengdu, CN;
Sihong Zhu, Chengdu, CN;
Quansheng Ran, Chengdu, CN;
Zeyu Wang, Chengdu, CN;
Malin Dong, Chengdu, CN;
Yue Lin, Chengdu, CN;
Xuejian Yang, Chengdu, CN;
China RAILWAY No. 8 Engineering Group Co., Ltd., Chengdu, CN;
Abstract
The present invention relates to the technical field of tunnel shield construction, specifically to a method for calculating diameter of an annular non-full formwork support for a circular shaft. By calculating and designing an inner diameter of a formwork support, sufficient space left inside a shaft can be ensured, and the thickness of secondary lining can be ensured at the same time, thereby preventing from affecting the structural stability of the shaft.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile